＜正＞ Generally speaking, there are two distinctions in the meaning of words: general and specific or abstract and concrete We call a word"general" when it refers to a group or a class, we call a word " specific" when it denotes individual objects or a member of that class. For example, "clothing-is a general word, but"overcoat","jacket", "blouse",
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机译：Active Comparison as a Means of Promoting the Development of Abstract Conditional Knowledge and Appropriate Choice of Diagrams in Math Word Problem Solving
